Stable isotopic composition of top consumers in Arctic cryoconite holes: revealing divergent roles in a supraglacial trophic network

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F21%3A43903254" target="_blank" >RIV/60076658:12310/21:43903254 - isvavai.cz</a>

Alternative codes found

RIV/60077344:_____/21:00542850 RIV/00216208:11310/21:10431018

Result on the web

<a href="https://bg.copernicus.org/articles/18/1543/2021/" target="_blank" >https://bg.copernicus.org/articles/18/1543/2021/</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5194/bg-18-1543-2021" target="_blank" >10.5194/bg-18-1543-2021</a>

Result language

angličtina

Original language name

Stable isotopic composition of top consumers in Arctic cryoconite holes: revealing divergent roles in a supraglacial trophic network

Original language description

Arctic cryoconite holes represent highly biologically active aquatic habitats on the glacier surface characterized by the dynamic nature of their formation and functioning. The most common cryoconite apex consumers are the cosmopolitan invertebrates - tardigrades and rotifers. Several studies have highlighted the potential relevance of tardigrades and rotifers to cryoconite holes&apos; ecosystem functioning. However, due to the dominant occurrence of prokaryotes, these consumers are usually out of the major scope of most studies aimed at understanding biological processes on glaciers. The aim of this descriptive study is to present pioneering data on isotopic composition of tardigrades, rotifers and cryoconite from three High Arctic glaciers in Svalbard and discuss their role in a cryoconite hole trophic network. We found that tardigrades have lower delta N-15 values than rotifers, which indicates different food requirements or different isotopic fractionation of both consumers. The delta C-13 values revealed differences between consumers and organic matter in cryoconite among glaciers. However, the mechanistic explanation of these variations requires further investigation focused on the particular diet of cryoconite consumers and their isotopic ratio. Our study introduces the first observation of carbon and nitrogen stable isotopic composition of top consumers in cryoconite holes analysed by an improved method for cryoconite sample processing, paving the way for further studies of the supraglacial trophic network.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10619 - Biodiversity conservation

Project

<a href="/en/project/LM2015078" target="_blank" >LM2015078: Czech Polar Research Infrastructure</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Biogeosciences

ISSN

1726-4170

e-ISSN

—

Volume of the periodical

18

Issue of the periodical within the volume

4

Country of publishing house

DE - GERMANY

Number of pages

15

Pages from-to

1543-1557

UT code for WoS article

000626345300001

EID of the result in the Scopus database

2-s2.0-85102269177